Comparison

Thermometer vs Smell Annotator

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Thermometer

This app transforms your iPhone or iPod Touch into a thermometer, displaying the exact outside temperature based on your current location. It provides detailed local weather conditions and allows you to check temperatures for other cities.

Highlights
  • Real-time outdoor temperature display
  • Location-based temperature readings
  • Local weather condition reports
  • Temperature checks for other cities
  • Celsius and Fahrenheit support
  • Universal app for all devices
Features
Read full description

Thermometer is the number 1 thermometer application on the AppStore. The most accurate thermometer application on the AppStore! Thermometer is the original and top selling application that turns your iPhone or iPod Touch into a thermometer. This application will tell you the exact outside temperature based on your current location (GPS or WiFi). An animation will show you the current outdoor temperature on an stylish red LED thermometer. ************************************************************ FEATURES : ************************************************************ ◉ Universal app. This application works on your iPad, iPhone or iPod Touch. One version for all devices! ◉ Local temperature based on your current position (GPS or WiFi). ◉ Local condition report, temperature, high & low, wind speed & direction, and humidity level. ◉ You can check the temperature for other cities. Choose the city you want to see weather for by scrolling through your saved cities. You can add or delete cities, and reorder your list. PLEASE, ENTER THE CITY AND THE COUNTRY. ◉ The temperature is displayed in Celsius or Fahrenheit. ◉ The most accurate thermometer application on the AppStore. ◉ The application is available in English, French, Spanish, Italian, German and Japanese. IMPORTANT : This application requires an active Internet connection to retrieve data. You also need to turn on "Location Services" option in the settings of your iPhone. If you like this application, please leave us a review on iTunes. Your support would greatly help. Thank you for taking the time to report any bugs or to request an enhancement to Thermometer application. Feedback is very important to us. We will do our best to answer queries. Email us at support@presselite.com

About

Smell Annotator

This application enables machines to digitally sense and analyze smells using nanomaterial-based technology. It allows users to view, annotate, and recognize smell measurements in real-time, functioning as part of a developer kit.

Highlights
  • Smell recognition
  • Smell digitalization and annotation
  • Saving and loading measurements
  • Real-time measurement visualization
  • Offline data collection
  • Graph synchronization
Features
Read full description

Today, machines can see, hear, feel, and even learn. But smell? Not really! Our nanomaterial-based technology enables machines to use an electronic sense of smell. Smell Annotator app is an AI-based software program which is used to view, annotate and analyze smell measurements taken with the Smell Inspector and to recognize annotated smells in real time. The Smell Annotator app is a part of the Smell Inspector Developer Kit. The Smell Annotator gives you access to the smell sensors of your Smell Inspector developer kit. APP FEATURES * Smell recognition [NEW] * Smell digitalization and annotation * Saving measurements and loading saved data * Visualization of real-time and saved measurements with temperature and humidity data * Collect measurement data with or without internet access * Sync graphs for better clarity of data SENSORS * 4 Smell iX16 detector chips * Temperature sensor * Humidity sensor SMELL INSPECTOR The Smell Inspector is a ready-to-use device for anyone and a developer kit. It is suitable for testing and exploring different smell-related applications in the fields of product quality, safety & security, life & care, air quality, and many others. It has four Smell iX 16 detector chips inside, can be connected to a PC, tablet, or smartphone, and can be operated with Smell Annotator software. USER MANUAL For more information about how to use the App and the Smell Inspector device, go to: http://smart-nanotubes.com/downloads/ ABOUT US Along with a great community of industry experts and researchers, SmartNanotubes Technologies shares the vision of digital smell recognition. Our goal is to enable digital smell recognition in a fast and easy way and help our customers to develop product solutions for their own smell and gas detection applications. Visit us at: http://smart-nanotubes.com

Screenshots

Thermometer3 screens
Smell Annotator3 screens

Verdict

The call

The clearest difference is rating: Thermometer at 4.4 against Smell Annotator's 1.0. Thermometer also leads on ratings volume (4.2K vs 1) and iOS requirement (13.0 vs 15.0). Smell Annotator's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Thermometer sells 1 one-off in-app purchase. Smell Annotator asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Thermometer holds the better App Store score, 4.4 against 1.0. That said, the two scores are not equally well evidenced: Thermometer has 4.2K ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Thermometer ships an update every 2 months, Smell Annotator monthly. The most recent releases landed on September 23, 2026 and September 14, 2026 respectively.

Scorecard7 real differences · 3 level
Thermometer versus Smell Annotator: the parameters behind the verdict, then further details
ParameterThermometerSmell Annotator
PriceFreeFree
Rating4.4 (4.2K ratings) — better1.0 (1 ratings)
Positive reviews30.1% of reviews
Number of ratings4.2K — better1
Update frequencyEvery 2 monthsMonthly — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS13.0 — better15.0
Further details — not scored
Size48 MB53 MB
Age rating4+4+
DeveloperAlexandre MorcosSmartNanotubes Technologies

Customer experience

Thermometer

All ratings4,229 ratings
Positive84.6%
Neutral4.9%
Negative10.5%
Written reviews332 reviews
Positive30.1%
Neutral6.9%
Negative63.0%

Smell Annotator

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%

Bugs and requests

Thermometer

Reported bugs

3 issues
  • App crashes frequently
  • Doesn't detect location properly
  • Reported temperatures are inconsistent

Requested features

3 requests
  • Option to display indoor temperature
  • Real-time temperature updates
  • Ability to set temperature alerts/alarms

Smell Annotator

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Thermometer

One-time1
  • Temperature Forecast$1.99
None

Smell Annotator

No in-app purchases

Questions

Is Thermometer free?
Thermometer is free to download, with in-app purchases available.
Is Smell Annotator free?
Smell Annotator is free to download, with no in-app purchases.
Which has better reviews, Thermometer or Smell Annotator?
Thermometer is rated higher. Thermometer averages 4.4 out of 5 from 4.2K ratings, while Smell Annotator averages 1.0 from 1 ratings.
Do Thermometer or Smell Annotator have ads?
Thermometer shows ads; Smell Annotator does not.
Which is updated more often, Thermometer or Smell Annotator?
Thermometer ships an update every 2 months, and Smell Annotator monthly. Most recently, Thermometer was updated on September 23, 2026 and Smell Annotator on September 14, 2026.

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